The White silkie was one year old. she was okay this a.m. girlfriend was doing chores while i was at work and she called and said the silkie started foaming at the mouth. she quarantined her and about 1 hour later she died. the only thing i have changed is the water, i added one package of vits to 45 gallon drum of rain water. We just recently had a lot of chicks, so i am using the vits for all the brood.. am i wrong. i couldn't tell what poop was hers, it came suddenly. all help would be appreciated. i do not anymore loss to my girls. she was on one quarter scratch one rolled oats and half layer, her diet has been pretty much the same. can a poultry died from over vitamining if that's a word?